Output value of priority mapping table.
Different priority has different hpnicfIfQoSPrePriMapTableExportValue.
Priority-type Range of hpnicfIfQoSPrePriMapTableExportValue
dot1p (0..7)
dscp (0..63)
lp (0..7)
exp (0..7)
ipPrecedence (0..7)
up (0..7)
dp (0..2)
fc (0..7)
rpr (0..2)